Metal-working machine



Feb. 24, 1931.

A. W. HAPPEL METAL WORKING MACHINE Filed March 5l, 1928 atentedl Feb. 24,V 193i l j ALBERT W. vRAPPEL, Y

y Y j OE TOLEDO, OHIO, A CORPORATIONk OEOHIO othersimilar operations. i

METALwOaKING MACHINE- i i 'Appnation aiedna'rch 31, 1928.7 seriainogaeeas.' 7

This Yinvention relatesY tol metal working machines, rand especiallyv tomechanism for punching holesV inmetal or for performing The general Object of the inventiOnLis to' provide mechanism whereby 'ae-punch'or Asinnilar tool maybe Operated with an adjustable stroke,fthus making it possible-to set-thesame so that it'willi always come-torest at apoint- *just above the material;

With lthe present constructiomhowe'ver, -thetool does" not come to rest untilithas been withdrawn far enough Y to'strip'tlie work therefrom and has beenl againy advanced to the 4desired-position. In case the adjustment issuch that thev toolcomes to rest in 7a higher position,th'e toolmay'be brought down closer '-to' -the surfa ce ofY the Amaterial by means of a handoperated leverf. Thetool has what maybe iter-meda full floatingsupport, so Ythat it will normally remain y Vin any position to which it is adjusted. This the part-s in position for idling.

.Kilo

' .E insures thevutfmost conveniencein Operating the machine, either when. punching. holes-1n' materials of yariousthicknes's rwhen punching a large number of'holesin material ofuniformthickness. Y' A Y The specific `construction of the invention in the form which at present seems most Vdesirable, together withits 'Inode of operation,

" LWill be more particularly 'described in'connection with Figure `l is a Vertical longitudinal vsection throughV the'front end of a punching machine embodying the invention,` the parts being shown'in position for operation.

Fig. 2 is a View similar to Fig. `1,-'lout with the accompanyingr drawings, in

. Ywardly extending seat 6 for supporting a die 7. Above the seat 6 the frame is provided with a head 8, to which is secured a front housing plate 9to form a vertical guideway 10 for a plunger 11 towhich the punch 12 1s l Yby the secured. Theusual stripper 13' is val'lsoselcuredV to the-head and is formed; with'ya holed.. 14 throughwhich thevpuncli 12 operates.

or TOLEDO, omo, Vlissien'oa To 'K'E'NT-OWENs MACHINE COMPANY,

The piungeriiis formed was Siae-S with arms- 15 which Yextend upwardly. in the side which is mountedon a shaft 19 and is adapted manner; r-lhe ram 16 isadapted tomoveup 60 f kand down between the arms land is-formed rwith lug which' is guided formed in one of the arms. Y i

- The plunger 111 is coi-inect'ed"at Yits rear V sidel by alink21to'an arm 22 which is secured?. to a shaft-23 Inountedfor Vrocking movement, in the frame.A rearwardly projecting arm inl a-'channel20 'l 24 issecu'red tothe shaft 23 and'has anfeXaff tension 25 whichv is connected by aspring'2'6 to afiXed part of the frame. The spring 26 is underA sufficient *tension to; counterbalance -K the weight of the' plunger 11andl the 'punch carried; thereby. The extension l 2 5ij has' La v threaded connection withthe arm F24 so` that position to which Vitis adjustechuntil it is acted upon by some positive force. AY hand lever`247 is secured to the'rock shaft 23, where# position. f As-,the` rocker arm 18 move'slback and forth to reciprocate the ram '16 power ,mayb'etrans- `mitted from the 'rami to the plunger 11 and punch 12 through the medium of a block 28,

Fig.' This blockfjis imount'ed'to .slide hori- Zontally forwardly 4Orjrearwardly.on a rear-l it may 'be adjusted longitudinally. until thek l proper counterbalance is attained. .By'this' imeans. a full floating support isfsecuredlfor 'j' the kpunch 12 and the Vlatter willreinain iniany j punch may be adjusted toany v"desired y when the latter-'isfinf'theposition'shown' in Y ward'eXtensionfQQ of the-plunger 11. "For controlling the lposition-of the block 28thelatter is connectedby a link 30 to an arm .31 A which is' securedrto a. rock shaft 32 mounted in the france5. f An arm 33 secured to the shaft 32 is connected'by a` spring 3ttoanxed part-Of the frameiand fthe tension ofthe spring 34 is suflicient tohold the block'28 re'- tracted, as shown in Fig.`2, or to return it to that positionfafterfit has beenvadvanced When it is desiredito operate the punch, therefore, the shaft 32Vis rocked to 'advance the block 28 into the path of the ram, whereupon the punch willbe' actuated uponthe next downward stroke of the ram. As soon as the i block 28 is released and withdrawn from beneath .the ram, the latterf will reciprocate idly without actuatingthe punch. i i The plunger 11 isorined withtwo ears desired position.y For this purposeone of the Y l links 17k may be formed with a threaded'collar 4,5 in which is mounted an adjustable pin 46j This pin may be adjusted so that after the pawl 36 has been thrown outwardly and is held by .Y the latch 12, the; next downward stroke of theram 16 willcause theendfof the pin 46 to engage the plunger 11and lower it to the proper. position, as shown in Fig. 3.

extending forwardly from theY upper por`- tion of the arms 15, and betWeenftheSeears a pawl 36 is pivotally supported. The pawl 36 is weighted on the front side asshown at 37 so that it Vnormally swings by gravity into contact with lthe ram 16. "The ram 'is formed on itsfront sidew-itha lug` 38 having an inclined face,and below this lugv and Y spaced'therefromjis a Vshoulder?,39. vThe pawl 36-is formedwitha rearward .projection 420 adapted to cooperate with` the lug 3,8

upon the downward strolefof the ram or with the shoulderV 39 upon the upward stroke of,

` l the ram. The lower'end of the-pawl 36Jis formed w-ithfa notchv l1 adapted, under` certain conditions, tube engaged by theend of` a latch 42,'which 1s, mounted within-fg, chair yIt is alsoto be particularlynoted that the plunger 11,'aiter each working stroke,is with-A drawn `to the fullest extent of its upward movement, so that the work is completely nel 43 in the plunger 11 andfurgedv upwardly by a small spring 44;. -Y Y Y In the operation ofthe punch, as theiblock stripped from the punch, and that the plunger is subsequently advanced, eitherby operation 'of the hand lever27 or ,ol' the pin 16, to the position shown in Figure 3 where'v the @Work may be 'accurately gaged,before the v.block V28 is shifted forwardly for theA next operation ,of the punch. Y c f From the-foregoing description itwill be notedthat the ull'fioating support tor the` punch makesk it possible ito adjust the vsame to thev work vwith theutmosty facility, while; the

adjustablepin 146 makes it possible to eiectV the adjustment o the stroke so that thepunch will always come, to restin the mostfi'avor.- able position for gauging the v,work to be per- Y formed. .While I Vhave shownfvand described '28 is moved into the position shown in Fig. Y

VY1i the ramV 16," upon its downwardstrolre, strikes the block .28AY and therebymovesithe l plunger 11 and punch 12 downwardly. Upon the return'strole. of the ram16 the shoulder 39, which engages the projection 4001i' the pawl 36, raises the punch in readiness for the next stroke, Thusthe punch moves upv and down withV the ram'16 as long as the bloc'lr28 remainsvin its operative position. Vvhen the block 28 hasbeenretracted, as shown in Figi j 2,*,the .next downward stroke of the rain 16 l will cause the lug`38 to engage theupper face of theprojectionAOand will throw the pawl Y gforwardly. :The latch #l2 under Vthe influence of the springea will then engagethe notch Ll1', latching the pawl in the'position shown in'Fig. 2 sothat-the ram 16,1na'y oper;-

ate idly until the block 28 is again advanced. The 'block4 upon its advance depress'es vthe latch 42 and rele-ases the pawl'}36-so that the ram is again locked to theplunger, as shown in Fig. 1. y

With the construction. thus far described,

when the block 28 ,is Vretractedfto inoperative position the punch will norm-ally come to Arest in its uppermost position and will remainin that position by reason of its fulliloating support. When the material is brought into position to'be punched the 'punch maybe low-v ered into proximityl t0 the of the hand lever v27; i i

l When punching a large number `Vof holes in material oi uniform thickness, however, it is desirable to adjust the stroke of the punch so that it will automatically come to rest inthe material by means in.Y detail lther construction which kat present seems'most desirable for this purpose, it is apparent that ,ther saine' maybe v,considerably modiiied Y, without any material v departure- Vfrom the SeopfOf theinvention as .herein claimed.;

wila-Ieinmi-..l 1. In a machine 'of the classv described, arei ciprocableplunger, means forsecuring a tool sov thereto, a ram reciprocable in the samedrec-y tion as the plunger, a `block movable into operative position between the ram if and the plunger for transmittingpowerfrom the one Vto the other,'means rendered operative by the movement of the block to operative position, to cause the return movement of .the ram to be positively transmitted to` the 'p lunger,'and means for disconnecting the ram romthe plungerI upon withdrawalv oi`tl1e1block, but onlyfafter the ram has completedits upward stroke and'started'to return;

` 2. In a machine ofthe class described, a reciproc-able plunger, means for securing a'tool l thereto, a ramjre'ci'procable in the same direcftion as the plunger,- control means effective,

when moved to .operzunfvet position, to connect the plunger to the. ramso as to berecipro lcated thereby, -and means for disconnecting tonally connecting the plunger to the ram to be operated thereby, and adjustable means connected with theram for advancing the reciprocable ram, a plunger locatedV in ad- Vance of the ram, a block, means for inserting the block between the ram and the plunger to cause the plunger to advance withthe ram, a pawl operable to lock' the plungerto the ram, and means to moveV the pawl to inoperative position during the downward stroke of the ram after the block is withdrawn.

5. In a machine of Vthe class described, a

l reciprocable ram, a plunger located in addirection, a block, means for inserting the` Vance of the ram and reciprocable in the same blockl between the ram and the plunger to causev the plunger to advance with the ram,

a pawl mounted on one of the reciprocating members and engageable with'the other reciprocating member to cause both members to return simultaneously, meansto move the pawl into inoperativeposition during the downward stroke of the ram after the blocl;

is withdrawn, and means to .latch the paw in its inoperative position. Y

`,6. In a machine of the class described, da

of thereciprocating members and engageable with the other reciprocating member to cause. v

both members to return simultaneously,

means to move the pawl into inoperative position after the block is withdrawn, and aj spring latch to hold the pawl inits inoperative position, said latch being in the path of the block and actuated thereby, as the block is advanced to operative position, to release the pawl and permit it to return to operative position.

y 7. In ka machine .of the classdescribed, a reciprocableram, a plunger located in advance of vthe ram, a block, means for moving the block to operative position between the ramand the plunger for causing the plunger to advance with the ram, a pawl operable to return the plunger with the ram, means to move the pawl to inoperative position during the downward stroke of the ram ater the block is withdrawn, and independent adjustable means for determiningthe position in continues to reciprocate.`

in any position to which ithas been moved,

and a hand lever connectedwith said member' and operable to move it in the direction of its reciprocatory movement after it has been disconnected from the ramand vwhile the ,lattercontinues to reciprocate. 7 r Y y n 9. In a machine of thel class described, a tool`V carrying member guided for reciprocation, a ram, means foroptionally transmitting reciproca-tory movement f from the'. ramk to said member, a stripper` cooperating with said member, and `means for bringing said memberl to restl in a predetermined position only after it has been withdrawn past the stripper and again advanced, while the ram l0.v In a machine of the class described, a tool carrying member guided for reciprocation, a ram,'means fortransmitting reciprocatory movement from the ram to said member,a stripper cooperating with said member, means for disconnecting said. member Jfrom the ram only after thetoojl has lbeen withdrawn past the stripper, and other means for subsequently advancing said member-'to apredetermined position. v v y l1. In a Vmachine of the class described, ia"v Yreciprocable plunger, means forsecuring a A jtoolthereto, a ram reclprocable lntheysame,

direction ias the plunger, vmeans optionally f operable to'cause the reciprocatingL move- .ment of the ramto be positively transmittedV -to the plunger, and meansto cause' the plunger to come torest in aI'Jredeterininedf'posi-` tion only upon its return stroke, after being carried with the ram'to its uppermost position and disconnected therefrom. Y 1

V12.V In amachine of the classdescribed,'a

'reciprocable plunger,rmeans for securing a toolthereto, a ram reciprocable inthe same y direction as the plunger, meansfor optionally connecting the plunger to the ram'to reciprocate-therewith or disconnecting it after it has completed its upward stroke, so that the ram alone reciprocates, and means for moving the plunger downwardly a limited distance aiterit isdisconnected, saidrlast men- '3 I 'Y tioned means being adjustable toV vary the position in which the plunger finally comes to rest. e. ,i

In testimony whereof, I have hereunto signed my name to this specification. ALBERT W. IIAPPEL.

which the plunger comes to rest after the block and pawl tion.

.8. Ina machine of the class described,A a tool carrying member guided for reciprocation, a ram, means for optionally transmitf ting reciprocatory movement from the ram to said member, means for counterbalancing are moved to inoperative posi- 

